Cracked distillates of petroleum



Patented 8, i936 I UNITED. STATES PATENT OFFICE.

2,052,421- CRACKED ms'rmm'rcs or rn'momum Robert E. Burk and Herman r2 Lankelma, Cleveland, Ohio, assignors, by mesne assignments,

- to E. I. du Pont de Nemours & Company, Wilmington, DeL, a corporation of Delaware No Drawing. Application August '1, 1930, Serial No. 413,115

3 Claims. (Cl. 44-9) This invention relates to the improvement of line or at least a neutral reaction of the distillate cracked petroleum distillates, and more particuis advantageous. The mixing may be effected in larlycracked naphthas for motor fuels. Asis well any convenient manner, as for instance adding known, cracked distillates have an inherent tendthe agent to the distillate in a container and agi- 5 ency to develop more or less gum formation and tating to thorough dissemination, or proportion- 5 also go off color. In motor fuels, this is objecally feeding into-a stream of the petroleum distionable, and where gumming of the valves occurs tillate, thereby mixing in transit. may be serious. It'is among the objects of this Example-20 lbs. of 1,5 dihydroxy naphthainvention to inhibit such detrimental tendencies lene is dissolved in benzol to make up substantially in'cracked distillates, and in a manner facilitat- 10 gallons volume, and this is mixed with 2500 l ingimanufacturing process in accordance with barrels of cracked gasoline. desirable practice. Similarly, any of the various agents contem- To the accomplishment of the foregoing and plated can be incorporated; and cracked distillates related ends, the invention, then, consists of the be so treated, for the production of motor fuels features hereinafter fully described, and particuetc., which'may be stored and used, with control 15 larly pointed out in the claims, the following deof the gumming and discoloration tendencies scription setting forth in'detail certain embodiotherwise objectionably occurring.

ments of the invention, these being illustrative Other modes of applying the principle of the inhowever of but a few of the various ways in which vention may be employed instead of the details the principle of the invention may be employed. disclosed, change being made as regards such 20 In accordance with the invention, a cracked pedetails, provided the features stated in any of the troleum distillate such as is prone to develop gum following claims, or the equivalent of such, be formation is subjectedto the action of a dihyemployed.

droxy derivative of a condensed nucleus hydrof We therefore particularly point out and discarbon or a derivative in which the two hydroxyl tinctly claim as our invention:--- 5 groups are preserved, such compounds as 1,5 di- 1. A cracked gasoline'normally'tending to dehydroxy naphthalene, and 1,2 dihydroxy anvelop gummy substances upon storage and conthraquinone being particularly desirable. taming a dihydroxy anthraquinone compound Such agents, individually or in mixture of two 7 in quantity sumcient to retard such gum to f or more, may be incorporated in the cracked 'distion. tillate to be treated. The amount required is 2. A cracked gasoline normally tending to desmall,ior instance 0.00% to 0.5 per cent. In genvelop gummy substances on storage and having eral, it is not necessary to exceed one-half of one incorporated therein in an amount sumcient to per cent., or at the maximum one per cent., since inhibit such gum. formation dihydroxy anthra- 5 excessive amounts are'merely wasted. A desirquin one, 1 able manner. of incorporating the material into 3. A cracked gasoline normally tending to dethe petroleumdistillate may involve first dissolvvelop gummy substances on storage and having ing the agent ina suitable solvent, for instance incorporated therein in an amount suilicient' to ether, benzol, etc., and this solution may then be inhibit such gum formation 1,2 dihydroxy anthra- 40 mixed with the distillate. The petroleum distilquinone.

latemay have been previously subjected to the ROBERT E.'BURK. customary lye wash if desired, and a slight alka- MAN P., l r m 

